Online PHP editor | output for BKU7J

Output for 7.3.32 - 7.3.33, 7.4.33, 8.0.13, 8.5.1: Fatal error: Uncaught Error: Call to undefined function bcadd() in /in/BKU7J:5 Stack trace: #0 {main} thrown in /in/BKU7J on line 5
Process exited with code 255.
Output for 8.0.2 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.4.16, 8.5.0: Fatal error: Uncaught ValueError: bcadd(): Argument #1 ($num1) is not well-formed in /in/BKU7J:5 Stack trace: #0 /in/BKU7J(5): bcadd('1.0E-8', '2.0E-8', 10) #1 {main} thrown in /in/BKU7J on line 5
Process exited with code 255.
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 7.4.0 - 7.4.32, 8.0.0 - 8.0.1: Warning: bcadd(): bcmath function argument is not well-formed in /in/BKU7J on line 5 Warning: bcadd(): bcmath function argument is not well-formed in /in/BKU7J on line 5 sum = 0.0000000000
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.31: sum = 0.0000000000